How to use1)Work with TV/monitor: Camera powered by provided AC adatper. Connect it to TV/monitor with RCA/BNC cable.Then watch live video & audio, or record, play on the TV/monitor;2) Work with DVR(AV-IN jacked, e. G. TE968H): Camera powered by DVR. Just directly connect the camera with DVR,It starts to work. Then watch live video & audio, or record, play, take pictures on DVR.